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This paper presents a methodology to design an effective wind speed observer using an alternative mathematical representation of the aerodynamic torque of a variable-speed wind turbine. This alternative model is linear in parameters. Then, using this observer, a pitch fault detection scheme is conceived. Numerical experiments using the National Renewable Energy Laboratory wind turbine simulator FAST (Fatigue, Aerodynamics, Structures, and Turbulence) code were performed to support the design.

An Effective Wind Speed Observer for Pitch Fault Detection in Wind Turbines